Count Ernst Rüdiger von Starhemberg (1638–1701) was an Austrian nobleman and military leader known for his role in the defense of Vienna during the Ottoman Empire's siege in 1683. He was appointed as the commander of the city's defenses and played a crucial role in organizing the resistance against the attacking forces. Starhemberg's leadership and strategic planning were instrumental in the successful defense of Vienna, which ultimately led to the defeat of the Ottomans. His efforts earned him recognition and respect, solidifying his legacy in Austrian history as a key figure in the struggle against Ottoman expansion in Europe.